mirror image for president obama. every time he gets a question, he's going to try to focus on mitt romney's plans, governor romney's plans for the future and say, listen, we may not be in the best shape right now, but it's going to be even worse if we implement his plans. >> each of them will be pivoting? >> reporter: each time. here's the thing. both sides don't really know what's going to happen tonight, because, as david pointed out, this format is so loose. once they get into the discussion, almost anything can happen. they could directly challenge each other. jim lehrer could directly challenge them. but they really don't know. >> it is going to be such an exciting night. and a reminder that george and i will be right here with you and the abc news team, ready to react and analyze and fact check. one-on-one, the candidates debate, 9:00 p.m. eastern, 6:00 central. >>> and we move on now on "world news" because we have two developing stories from overseas. tonight in syria, the city of aleppo, their new york city,